package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.metadata.CellData;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exceptionHandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import javax.security.auth.Subject;
import java.util.Map;
//由于这个类不能交给spring进行管理，需要自己new，不能注入其他对象
//不能实现数据库操作
public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {


    public EduSubjectService subjectService;
    public SubjectExcelListener(){}
    public SubjectExcelListener(EduSubjectService subjectService){
        this.subjectService=subjectService;
    }

    //读取excel中一行一行数据
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData==null){
            throw new GuliException(20001,"文件数据为空");
        }

        //判断一级分类是否重复
        //判断条件是:1.id是否相同 2.名字是否相同
        EduSubject existOneSubject=this.existOneSubject(subjectService,subjectData.getOneSubjectName());
        if(existOneSubject==null){
            existOneSubject=new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }

        //获取一级分类的id值
        String pid=existOneSubject.getId();
        //判断二级分类是否重复
        //判断条件是:1.父类的id是否相同 2.名字是否相同
        EduSubject existTwoSubject=this.existTwoSubject(subjectService,subjectData.getTwoSubjectName(),pid);
        if(existTwoSubject==null){
            existTwoSubject=new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }
    }


    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");

        //getOne方法是条件查询方法
        EduSubject oneSubject=subjectService.getOne(wrapper);
        return oneSubject;
    }


    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);

        //getOne方法是条件查询方法
        EduSubject oneSubject=subjectService.getOne(wrapper);
        return oneSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
